CSP Unblock Firefox

CSP Unblock

By: Balvin
No more Content-Security-Policy limitations. This extension removes all CSP-related headers during website testing.

Features & Capabilities

This extension removes the following CSP-related response headers to remove limitations caused by CSP.

  1. "content-security-policy" header
  2. "content-security-policy-report-only" header
  3. "x-webkit-csp" and "x-webkit-csp-report-only" headers
  4. "x-content-security-policy" and "x-content-security-policy-report-only" headers
  5. reporting APIs ("report-to" and "reporting-endpoints")
Use Cases: 1. This extension can temporarily remove the limitations of CSP so that the developer can test inline and remote scripts. Also, you can load different cross-origin resources without any limitation. 2. Allow a website to load a remote worker script 3. Allow a website to play remote media

Notes:

  1. Disable the extension when you are browsing the internet. By removing CSP, the website's protection reduces significantly which might harm you.
  2. The extension removes specified CSP-related headers from the top-frame and all sub-frame elements

Definitions: "content-security-policy" header: The HTTP Content-Security-Policy response header allows website administrators to control resources the user agent is allowed to load for a given page. With a few exceptions, policies mostly involve specifying server origins and script endpoints. This helps guard against cross-site scripting attacks (Cross-site_scripting).

"content-security-policy-report-only" header: The HTTP Content-Security-Policy-Report-Only response header allows web developers to experiment with policies by monitoring (but not enforcing) their effects. These violation reports consist of JSON documents sent via an HTTP POST request to the specified URI.

User Growth & Download Statistics

Contact the developer

Chrome-Stats does not own this Firefox add-on. Please use these information below to contact the Firefox add-on developer.
Developed by:
Balvin
Firefox Add-ons Store
https://addons.mozilla.org/firefox/addon/csp-unblock/
Website:
https://webextension.org/listing/csp-unblock.html

User Reviews

It's FOSS, and available for AOSP, but doesn't disable CSPs.
by Ro*****, 2026-05-30

CSP unlock saved my life, on LB bad customer deployment, which many css and js disabled on LB, which load pages lazy without rendering page properly
by Ta*****, 2026-03-19
View all user reviews ›

Is CSP Unblock Safe?

Risk impact
Risk impact measures the level of extra permissions an extension has access to. A low risk impact extension cannot do much harms, whereas a high risk impact extension can do a lot of damage like stealing your password, bypassing your security settings, and accessing your personal data. High risk impact extensions are not necessarily malicious. However, if they do turn malicious, they can be very harmful.

CSP Unblock requires a few sensitive permissions. Exercise caution before installing.

Risk impact analysis details
  • Critical Allows access to all websites, posing a significant security risk as it can monitor and modify data from any visited site.
Risk likelihood
Risk likelihood measures the probability that a Firefox add-on may turn malicious. This is determined by the publisher and the Firefox add-on reputation on Firefox Add-ons Store, the amount of time the Firefox add-on has been around, and other signals about the Firefox add-on. Our algorithms are not perfect, and are subject to change as we discover new ways to detect malicious extensions. We recommend that you always exercise caution when installing a Firefox add-on.

CSP Unblock is probably trust-worthy. Prefer other publishers if available. Exercise caution when installing this add-on.

Risk likelihood analysis details
  • High This extension has low user count. Unpopular extensions may not be stable or safe.
  • Medium **** ********* *** ***** ** *** **** * ******* *** ********** *** *** ** ****** ** *****
  • Low **** ********* *** ******* **** **** * ****** **** ***** ******** *** **** ****** ** ** ****** *** *****
  • Good **** ********* *** **** **** *******
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